Tianfu, Suihui, Taiyi Tianfu, and the Superposition of Movement and Qi

Heavenly Conformity (tian fu), Yearly Convergence (sui hui), and Great Unity Heavenly Conformity (taiyi tian fu) can, in simple terms, be understood as applications in which Five-Movement and Six-Qi conditions are superimposed on the annual time scale.

Rules of superposition appear throughout the Inner Canon and, in this model, help explain why certain combinations are treated as carrying a higher probability of extreme or abnormal responses. By analogy with ordinary physics, one might compare this to constructive interference between waves. The analogy should remain an analogy: the classical framework applies superposition across different dimensions when their symbolic properties coincide.

For example, I once encountered a friend from special-forces training who underwent a tolerance exercise involving winter + midnight + immersion in cold water and developed glomerular bleeding that required hospital care. Constitution must also have mattered, because not everyone undergoing the training required hospitalization. This illustrates the idea that multiple conditions can overlap.

The present classical example concerns Five Movements / Six Qi × annual scale. In contrast, the modern physician Liu Yushan’s work on diagnosis by daily stems and branches explores a Five Movements / Six Qi × daily scale superposition.

A classical passage states:

When the qi-wheel meets the Yearly Convergence and the Movement encounters Heavenly Conformity: Heavenly Conformity acts as the executor of law, Yearly Convergence as the one who carries out the command, and Great Unity Heavenly Conformity as the honored person. When one is struck under the executor of law, disease is rapid and dangerous; under the one carrying out the command, disease is slower and lingering; under the honored person, disease is sudden and may be fatal.

When the qi of the Five Movements coincides with the qi of Heavenly Administration, it is called Heavenly Conformity. For example, in Ji-Chou or Ji-Wei years, the Heavenly Stem Ji belongs to the Jia–Ji transformation into Earth, while Chou and Wei correspond to Taiyin Dampness-Earth governing Heaven; thus the annual movement and the governing heavenly qi coincide. Twelve years are traditionally listed in this category: Ji-Chou, Ji-Wei, Wu-Yin, Wu-Shen, Wu-Zi, Wu-Wu, Yi-Mao, Yi-You, Ding-Si, Ding-Hai, Bing-Chen, and Bing-Xu.

When the transformed Movement associated with the Heavenly Stem coincides with the element of the annual Earthly Branch, it is called Yearly Convergence. For example, in a Ding-Mao year, Ding combines with Ren to transform into Wood, and Mao itself is a Wood branch, so the annual Movement coincides with the branch. Eight years are traditionally listed: Ding-Mao, Wu-Wu, Jia-Chen, Jia-Xu, Ji-Chou, Ji-Wei, Yi-Chou, and Bing-Zi.

When Heavenly Conformity and Yearly Convergence occur together, the year is called Great Unity Heavenly Conformity. Wu-Wu is the standard example: Wu–Gui governs Fire Movement; Zi–Wu years have Shaoyin Sovereign-Fire governing Heaven, so the Fire Movement coincides with the heavenly qi; Wu is also a Fire branch, so the annual Movement also converges with the branch. Movement qi, heavenly qi, and annual qi therefore all coincide. Four years are traditionally listed: Wu-Wu, Ji-Chou, Ji-Wei, and Yi-You.